Flame retardant and fire resistant cable

Product Description

An important distinction exists between fire resistant cables and flame retardant cables, even though both of them are subjected to various fire performance tests in order to earn their respective classification. In brief, flame retardant cables are designed to resist the spread of fire into a new area. Fire resistant or fire rated cables are designed to maintain circuit integrity and continue to work for a specified period of time under defined conditions.

Our fire performance cables are usually manufactured according to the standards as follows:

Fire resistant and flame retardant standards:

BS7629-1, BS8592, BS EN 50200 PH30 / PH60 / PH120, BS7846 and BS6387 CWZ，BS8491，BS8434-2, IEC 60331-21, IEC 60331-23, IEC 60331-25, IEC 60331-1, IEC 60331-2, IEC 60331-3, IEC 60332-1-2, IEC 60332-3-22, IEC 60332-3-23, IEC 60332-3-24, BS EN 60332-3-22, BS EN 60332-3-23, BS EN 60332-3-24

Fire resistant standards:

BS 7629-1	Electric cables – Specification for 300/500 V fire resistant, screened, fixed installation cables having low emission of smoke and corrosive gases when affected by fire Part 1: Multicore cables
BS 7846	Electric cables – Thermosetting insulated, armoured, fire-resistant cables of rated voltage 600/1 000 V for fixed installations, having low emission of smoke and corrosive gases when affected by fire – Specification
BS 8592	Electric cables – Thermosetting insulated, non-armoured, fire-resistant, single core non-sheathed cables of rated voltage 450/750 V, having low emission of smoke and corrosive gases when affected by fire – Specification
BS EN 50200	Method of test for resistance to fire of unprotected small cables for use in emergency circuits
BS 6387	Test method for resistance to fire of cables required to maintain circuit integrity under fire conditions
BS8434-2	Methods of test for assessment of the fire integrity of electric cables – Part 2: Test for unprotected small cables for use in emergency circuits – BS EN 50200 with a 930 degree C flame and with water spray
BS 8491	Method for assessment of fire integrity of large diameter power cables for use as components for smoke and heat control systems and certain other active fire safety systems
IEC 60331-21	Tests for Electric Cables under Fire Conditions – Circuit Integrity – Part 21: Procedures and Requirements – Cables of Rated Voltage up to and Including 0,6/1,0 kV
IEC 60331-23	Tests for Electric Cables under Fire Conditions – Circuit Integrity – Part 23: Procedures and Requirements – Electric Data Cables
IEC 60331-25	Tests for Electric Cables under Fire Conditions – Circuit Integrity – Part 25: Procedures and Requirements – Optical Fibre Cables
IEC 60331-1	Tests for electric cables under fire conditions – Circuit integrity – Part 1: Test method for fire with shock at a temperature of at least 830°C for cables of rated voltage up to and including 0,6/1,0 kV and with an overall diameter exceeding 20 mm
IEC 60331-2	Tests for electric cables under fire conditions – Circuit integrity – Part 2: Test method for fire with shock at a temperature of at least 830°C for cables of rated voltage up to and including 0,6/1,0 kV and with an overall diameter not exceeding 20mm
IEC 60331-3	Tests for electric cables under fire conditions – Circuit integrity – Part 3: Test method for fire with shock at a temperature of at least 830°C for cables of rated voltage up to and including 0,6/1,0 kV tested in a metal enclosure

Flame retardant standards:

IEC 60332-1-2	Test for vertical flame propagation for a single insulated wire or cable – Procedure for 1 kW pre-mixed flame
IEC 60332-3-22	Test for vertical flame spread of vertical mounted bunched wires or cables – Category A
IEC 60332-3-23	Test for vertical flame spread of vertical mounted bunched wires or cables – Category B
IEC 60332-3-24	Test for vertical flame spread of vertical mounted bunched wires or cables – Category C

Fire Resistant and Flame Retardant Cables

Flame retardant cable

The flame retardant cable is mainly featured in low liability of fire or that second combustion is only limited to a certain range, meets the IEC60332 combustion testing requirements, and is applicable to the places with flame retardant requirement.

Product Category

1. Ordinary flame retardant cable: In the event of fire, the cable may produce a large amount of corrosive gases and smoke after combustion, and can be used in general occasions with low flame retardant requirement. Its flammability has A, B, C, D four categories, and its cable models are added with ZRA- (or ZA-), ZRB- (or ZB-), ZRC- (or ZC-), and ZRD- (or ZD-) before ordinary cable models, respectively.

2. Low-halogen flame-retardant cable: in addition to maintaining the general characteristics and electrical properties of the flame-retardant cable, it also has the following characteristics:

a. low halogen acid gas emissions;

b. low corrosivity;

c. less smoke generated.

Its cable model is added with DDZ- (or DL-) before ordinary XLPE insulated cables model.

3. Low smoke zero halogen (LSZH) flame retardant cable: featured in:

a. no halogen acid gas release;

b. small fuming amount;

c. less corrosive gas generated;

d. good flame retardant property.

and has certain mechanical and physical and electrical properties to meet the operating requirements for the cable. It is widely used in nuclear power plants, subway stations, telephone switching and computer control centers, high-rise buildings, hotels, radio and television stations, important military facilities, oil platforms, etc. Its cable models include WDZ- YJY, WDZ-YJY23, WDZ-YJY33, WDZ-YJY43, WDZ-YJE, WDZ-YJE23, WDZ-YJE33, WDZ-YJE43 or WL-YJE, WL-YJL23,

WL-YJL33, and WL- YJL43, and can be matched with the flame retardant levels A, B, C, D, such as WDZA-.

4. Oxygen-barrier cable (also known as highly-flame retardant cable): a layer of non-melting, non-flammable, halogen-free, smoke-free fire-resistant plastic material is filled or wrapped between the cable insulated core and the cable sheath, i.e. insulating organic is used to isolate the cable from the outside oxygen gas, so that the cable is non-combustible or flame- retardent. Its cable model is added with GZR- before the ordinary cable model.

Main features

1. Ordinary flame retardant cable

For Class A and Class B fire tests, the fire time is 40 minutes, and for Class C and Class D fire tests, the fire time is 20 minutes, and the charring height does not exceed 2.5 m.

2. Low-halogen low-smoke flame retardant cable

Halogen acid gas emission <100 mg/g, smoke density (transmittance) > 30%, from the group burning test, it meets the requirements of Class C flame retardancy.

3. Low smoke zerohalogen (LSZH) flame retardant cable:

Halogen acid gas all-emission 0 mg/g, pH value ≥ 4.3, conductivity ≤ 10 us/mm, toxicity index ≤ 5.

From the group burning test, it at least meets the requirements of Class C flame retardancy, smoke density (transmittance) ≥ 60%.

4. Oxygen barrier cable (highly-flame retardant cable)

From the group burning test, it meets and exceeds the requirements of Class A flame retardancy, and the smoke density (transmittance) is equal to or close to national standard GB/T17651-2008 and international standard IEC61034 low smoke standard.

It is especially suitable for 6 KV-35 KV medium-voltage cable frame retardancy, has not only flame retardancy up to Class A, but also has certain refractory characteristics (i.e. can still keep 2.4 Uo insulation standard after burning for 20 min).

Notes: Users can select category and class of flame retardant cable according to laying places.

Fire-resistant cable

Fire-resistant cable can still ensure the normal operation of lines within certain time in case of combustion. It is different from the ordinary flame retardant cable in that in the event of a fire, it may continue electricity transmission. The use of this product will allow high-rise buildings, subways, power plants and other major occasions to have better fire safety and fire rescue capability.

Operating characteristics

1. Cable laying temperature: ≥0°C

2. The highest rated temperature values of PVC insulated cable conductor and XLPE insulated cable conductor are 70°C, and 90°C, respectively.

3. The highest rated temperature values of cable conductor in case of short circuit (the longest duration not more than 5s) does not exceed 160°C and 250°C for PVC insulation and XLPE insulation, respectively

4. Under rated voltage of the cable, the fire-resistant cable can maintain 90 min normal operation in is 750°C-800°C flame.

5. Bending radius: same as ordinary cabl.

Main electrical performance

Same as non-refractory 0.6/1KV power cable or 450/750V control cable. Belong to fire-resistant cable series products.

Main electrical properties of the cable:

Product model and name

Model	Name
NH-VV、NH-VV22 NH-KVV、NH-KVV22	PVC insulated and PVC sheathed fireproof	Power cable Control cable
NH-YJV、NH-YJV22 NH-KYJV、NH-KYJV22	XLPE insulated and PVC sheathed fireproof	Power cable Control cable
WL-NH-YJE、WL-NH-YJE23 WL-NH-KYJE、WL-NH-KYJE23	XLPE insulated and polyolefin sheathed fireproof	Power cable Control cable
NH-BV	PVC insulated fireproof	Wire
NH-BYJ	XLPE insulated fireproof	Wire

Notes:

1. The Model“NH-” can be written to “N-”

2. May also produce steel wire armored.

Range of production

Model	Core number	Conductor core nominal cross sectional area(mm2)	Model	Core number	Conductor core nominal cross sectional area(mm2)
NH-VV NH-YJV WL-NH-YJE	1	1.5~400	NH-VV22 NH-YJV22 WL-NH-YJE22	1	10~400
	3	1.5~300		3	2.5~400
	3+1	4~300		3+1	4~300
	4	2.5~240		4	2.5~240
	4+1	4~240		4+1	4~240
	5	2.5~240		5	2.5~240
	3+2	2.5~300		3+2	2.5~300
NH-KVV NH-KYJV WL-NH-KYJE	4~37	1	NH-VV22 NH-YJV22 WL-NH-YJE22	6~37	1
	4~37	1.5		4~37	1.5
	4~37	2.5		4~37	2.5
	4~14	4		4~16	4
	4~10	6		4~10	6
NH-BV	1	1.5~400	NH-BYJ	1	1.5~400

Applicable Standards

BS7629-1BS8592BS EN 50200BS7846BS6387BS8491BS8434-2IEC 60331-21

Certificate Display

**Low Voltage Directive Attestation (EU)**

Type and routine tests are issued from our own testing centre under the ISO 9001 quality system — test reports and certificates accompany every shipment.